Christina Hendricks Reveals What Sparked 'Game of Thrones' Rumors (Video)

The "Mad Men" actress put to rest speculation that she wants to star in the other hot television drama when she sat down with Conan O'Brien on Monday.

Mad Men and Game of Thrones are two of the most highly anticipated spring premieres, and there are rumors online that Christina Hendricks wants to star in both of them.

However, the actress told Conan O'Brien on Conan Monday night that not only is her interest in the HBO drama exaggerated -- she's never even seen it.

"One day someone asked what would be fun [to star in], and I was thinking about all those pelts and horns, wolves and horses. So I said, 'Game of Thrones.' I thought it would be fun to get into that whole time period and crazy costumes. The next thing you know.... I'd be thrilled, I would be so lucky. But I've not seen it yet. It was one of those quick answers," she explained. 

Over on NBC's The Tonight Show, Jimmy Fallon hosted one of his favorite games, "Do Not Play," where he advised viewers of bad music to avoid, including a group that plays General Hospital recaps.  

Seth Meyers welcomed Entourage star Jeremy Piven, who revealed that his mother helped him practice his lines before filming began on the ensemble comedy film. "To hear my mom playing Turtle is the funniest thing I've ever heard," he told the Late Night host.

He went on to explain that while filming Mr. Selfridge in England recently, "I was at a polo match, and Prince Harry kept calling me Ari. I thought if I corrected him I would be deported or beheaded."

Jimmy Kimmel also heralded Game of Thrones with a mock KFC marketing campaign and an angry "viewer" in the audience demanding that he not air any spoilers.

He then launched a "Sign Language Rap Battle" between signers who normally perform onstage with musicians but competed by interpreting Wiz Khalifa's "Black and Yellow," swear words and all.